Must-listen: Florence + The Machine & Ethel Cain's 'Morning Elvis' duet.

Kindred spirits (and sister witches), Florence + The Machine and Ethel Cain, have shared an official recording of their 'Morning Elvis' duet - recently performed together live in Denver.

About their collaboration, Florence says: "MORNING ELVIS IS A SONG ABOUT THE POWER OF PERFORMANCE. OF ROCK AND ROLL TRAGEDY AND TRANSCENDENCE. AND IT'S A SIGN OF A TRULY SPECIAL ARTIST WHEN THEY MAKE A COVER THEIR OWN WHEN HAYDEN SUNG THIS SONG IT FELT LIKE IT WAS HERS, SHE REALLY GAVE IT THAT OUTLAW ENERGY, LIKE WITCHES OF THE WILD WEST. I EVEN THREW MORE LINES AT HER ON THE DAY BECAUSE HER TONE AND CADENCE WAS SO PERFECT I WANTED TO HEAR MORE. AND SHE DID NOT MISS A LINE EVEN WITH ONLY AN HOUR TO REHEARSE. I TRULY THINK I HAVE FOUND A KINDRED SPIRIT AESTHETICALLY AND ARTISTICALLY AND NOW EVERY SHOW I SING MORNING ELVIS WITH AN ETHEL CAIN INFLECTION."

And Ethel says: "I WAS GIGGLING WHEN WE REHEARSED THE SONG JUST THE TWO OF US BEFORE THE SHOW BECAUSE FLORENCE TOLD ME THAT MORNING ELVIS WAS HER CHANNELLING HER INNER SOUTHERN ROCKER, AND I TOLD HER I COULDN'T STOP MYSELF FROM EMULATING HER BRITISH ACCENT ON CERTAIN WORDS. IT FELT LIKE A HOLY CONVERGENCE HAPPENING IN A BASKETBALL ARENA. FLORENCE'S DRESSING ROOM SMELLED LIKE POWDER AND SAGE AND WE WERE BOTH DRESSED IN WHITE, SINGING OUR LINES BACK AND FORTH TO EACH OTHER, AND I FELT LIKE I WAS BACK IN CHOIR PRACTICE, BUT WITH AN ACTUAL ANGEL THIS TIME SHE'S NEVER NOT SMILING, AND IF YOU WOULD HAVE TOLD ME WE WERE THE ONLY TWO PEOPLE IN THE ENTIRE VENUE WHILE WE SANG IT IN THE MIDDLE OF HER SET, I WOULD HAVE BELIEVED YOU."

Listen to the duet below...